From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Strange pings.
Date: Thu, 21 Apr 2005 23:34:46 +0000 [thread overview]
Message-ID: <42683896.3070308@dsl.pipex.com> (raw)
In-Reply-To: <200504200055.42395.tc@forest.one.pl>
tc@forest.one.pl wrote:
> 64 bytes from 192.168.1.1: icmp_seq• ttld time‰.0 ms
Which is about 2 packets @ 256kbit. I tested and got the same behaviour
with a simple setup, but max ping about 45 because htb dequeues in pairs
by default. If you change #define hysteresis from 1 to 0 in
net/sched/sch_htb.c then it's more accurate. Setting Quantum to your MTU
may also help.
> Then it is stable (0.4ms) for some time.
>
> The same situation repeats in about 60 second delay.
>
> Maybe someone solved this problem?
Give interactive class more rate than it needs. Latency was OK for me
with ICMP class rate 255kbit ceil 256kbit.
>
> PPS. Is it possible to create a filter that will match all packets?
I don't know about all, but all per protocol like -
.. protocol ip prio 10 u32 match u32 0 0 ..
.. protocol arp prio 11 u32 match u32 0 0 ..
Andy.
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next prev parent reply other threads:[~2005-04-21 23:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-19 22:55 [LARTC] Strange pings tc
2005-04-21 23:34 ` Andy Furniss [this message]
2005-04-22 21:08 ` tc
2005-04-24 11:03 ` tc
2005-04-24 23:59 ` Andy Furniss
2005-05-13 23:36 ` Andy Furniss
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